Rear bumper for a vehicle



FIG. 1 is a left perspective view of a rear bumper for a vehicle according to my novel design, the right perspective view being mirror symmetrical;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a left side view thereof, the right side view being mirror symmetrical; and,

FIG. 5 is a bottom view thereof. 

The ornamental design for a rear bumper for a vehicle, as shown and described. 